6 use Crypt
::OpenSSL
::Random
;
7 use Crypt
::OpenSSL
::RSA
;
10 use Time
::HiRes
qw(gettimeofday);
12 use PVE
::Exception
qw(raise);
14 Crypt
::OpenSSL
::RSA-
>import_random_seed();
16 use constant HTTP_UNAUTHORIZED
=> 401;
18 sub assemble_csrf_prevention_token
{
19 my ($secret, $username) = @_;
21 my $timestamp = sprintf("%08X", time());
23 my $digest = Digest
::SHA
::hmac_sha256_base64
("$timestamp:$username", $secret);
25 return "$timestamp:$digest";
28 sub verify_csrf_prevention_token
{
29 my ($secret, $username, $token, $min_age, $max_age, $noerr) = @_;
31 if ($token =~ m/^([A-Z0-9]{8}):(\S+)$/) {
34 my $ttime = hex($timestamp);
37 if (length($sig) == 27) {
38 # detected sha1 csrf token from older proxy, fallback. FIXME: remove with 7.0
39 $digest = Digest
::SHA
::sha1_base64
("$timestamp:$username", $secret);
41 $digest = Digest
::SHA
::hmac_sha256_base64
("$timestamp:$username", $secret);
44 my $age = time() - $ttime;
45 return 1 if ($digest eq $sig) && ($age > $min_age) &&
49 raise
("Permission denied - invalid csrf token\n", code
=> HTTP_UNAUTHORIZED
)
55 # Note: data may not contain white spaces (verify fails in that case)
56 sub assemble_rsa_ticket
{
57 my ($rsa_priv, $prefix, $data, $secret_data) = @_;
59 my $timestamp = sprintf("%08X", time());
61 my $plain = "$prefix:";
63 $plain .= "$data:" if defined($data);
67 my $full = defined($secret_data) ?
"$plain:$secret_data" : $plain;
69 my $ticket = $plain . "::" . encode_base64
($rsa_priv->sign($full), '');
74 sub verify_rsa_ticket
{
75 my ($rsa_pub, $prefix, $ticket, $secret_data, $min_age, $max_age, $noerr) = @_;
77 if ($ticket && $ticket =~ m/^(\Q$prefix\E:\S+)::([^:\s]+)$/) {
81 my $full = defined($secret_data) ?
"$plain:$secret_data" : $plain;
83 if ($rsa_pub->verify($full, decode_base64
($sig))) {
84 if ($plain =~ m/^\Q$prefix\E:(?:(\S+):)?([A-Z0-9]{8})$/) {
85 my $data = $1; # Note: not all tickets contains data
87 my $ttime = hex($timestamp);
89 my $age = time() - $ttime;
91 if (($age > $min_age) && ($age < $max_age)) {
93 return wantarray ?
($data, $age) : $data;
95 return wantarray ?
(1, $age) : 1;
102 raise
("permission denied - invalid $prefix ticket\n", code
=> HTTP_UNAUTHORIZED
)
108 sub assemble_spice_ticket
{
109 my ($secret, $username, $vmid, $node) = @_;
111 my ($seconds, $microseconds) = gettimeofday
;
113 my $timestamp = sprintf("%08x", $seconds);
115 my $randomstr = "PVESPICE:$timestamp:$username:$vmid:$node:$secret:" .
116 ':' . sprintf("%08x", $microseconds) .
117 ':' . sprintf("%08x", $$) .
120 # this should be used as one-time password
121 # max length is 60 chars (spice limit)
122 # we pass this to qemu set_pasword and limit lifetime there
124 my $ticket = Digest
::SHA
::sha1_hex
($randomstr);
126 # Note: spice proxy connects with HTTP, so $proxyticket is exposed to public
127 # we use a signature/timestamp to make sure nobody can fake such a ticket
128 # an attacker can use this $proxyticket, but he will fail because $ticket is
130 # The proxy needs to be able to extract/verify the ticket
131 # Note: data needs to be lower case only, because virt-viewer needs that
132 # Note: RSA signature are too long (>=256 charaters) and make problems with remote-viewer
134 my $plain = "pvespiceproxy:${timestamp}:${vmid}:" . lc($node);
136 # produces 40 characters
137 my $sig = unpack("H*", Digest
::SHA
::sha1
($plain, $secret));
139 #my $sig = unpack("H*", $rsa_priv->sign($plain)); # this produce too long strings (512)
141 my $proxyticket = "${plain}::${sig}";
143 return ($ticket, $proxyticket);
146 sub verify_spice_connect_url
{
147 my ($secret, $connect_str) = @_;
149 # Note: we pass the spice ticket as 'host', so the
150 # spice viewer connects with "$ticket:$port"
152 return undef if !$connect_str;
154 if ($connect_str =~m/^pvespiceproxy:([a-z0-9]{8}):(\d+):(\S+)::([a-z0-9]{40}):(\d+)$/) {
155 my ($timestamp, $vmid, $node, $hexsig, $port) = ($1, $2, $3, $4, $5, $6);
156 my $ttime = hex($timestamp);
157 my $age = time() - $ttime;
159 # use very limited lifetime - is this enough?
160 return undef if !(($age > -20) && ($age < 40));
162 my $plain = "pvespiceproxy:$timestamp:$vmid:$node";
163 my $sig = unpack("H*", Digest
::SHA
::sha1
($plain, $secret));
165 if ($sig eq $hexsig) {
166 return ($vmid, $node, $port);